Can AI help summarize article or abstract sentence keyword?
Yes. Text summarisation has been a research topic in (computational) linguistics for literally decades. Have a look at the Wikipedia page on Automatic Summarisation for an overview.

There are basically various different approaches: either, selecting salient sentences (or parts of sentences) which represent the gist of the text, or, trying to 'understand' the text and generating new sentences. The former is generally easier, and works on any text, while the latter would probably be able to produce better results, but is more complicated and would not work on any text, as it would be specific to a particular topic.